1 files changed, 255 insertions, 0 deletions
diff --git a/src/os.c b/src/os.c
new file mode 100644
index 0000000..c9f4ee8
--- /dev/null
+++ b/src/os.c
@@ -0,0 +1,255 @@
+#include "os.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/stat.h>
+
+// Function to check if a string ends with a specific suffix (case insensitive)
+int ends_with_wav(const char *str) {
+  size_t len = strlen(str);
+  if (len < 4) return 0;
+    
+  const char *suffix = str + len - 4;
+  return (strcasecmp(suffix, ".wav") == 0);
+}
+
+// Function to extract the example name from folder format: "example name[2048-44.1khz-32bit]"
+char* extract_example_name(const char *folder_name) {
+  char *result = malloc(strlen(folder_name) + 1);
+  if (!result) return NULL;
+    
+  strcpy(result, folder_name);
+    
+  // Find the opening bracket and terminate the string there
+  char *bracket = strchr(result, '[');
+  if (bracket) {
+    *bracket = '\0';
+  }
+    
+  // Remove trailing whitespace
+  int len = strlen(result);
+  while (len > 0 && (result[len-1] == ' ' || result[len-1] == '\t')) {
+    result[--len] = '\0';
+  }
+    
+  return result;
+}
+
+char* scan_for_wav(const char *directory_path) {
+    DIR *dir;
+    struct dirent *entry;
+    struct stat statbuf;
+    char full_path[1024];
+    char *result = NULL;
+    size_t result_size = 0;
+    size_t result_capacity = 1024;
+    int first_entry = 1;
+    
+    // Initialize result buffer
+    result = malloc(result_capacity);
+    if (!result) return NULL;
+    result[0] = '\0';
+    
+    // Open directory
+    dir = opendir(directory_path);
+    if (!dir) {
+        free(result);
+        return NULL;
+    }
+    
+    // Iterate through directory entries
+    while ((entry = readdir(dir)) != NULL) {
+        // Skip . and .. entries
+        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
+            continue;
+        }
+        
+        // Create full path
+        snprintf(full_path, sizeof(full_path), "%s/%s", directory_path, entry->d_name);
+        
+        // Check if it's a directory
+        if (stat(full_path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+            // This is a subdirectory, scan for WAV files in it
+            DIR *subdir;
+            struct dirent *subentry;
+            
+            subdir = opendir(full_path);
+            if (!subdir) continue;
+            
+            // Extract example name from folder name
+            char *example_name = extract_example_name(entry->d_name);
+            if (!example_name) {
+                closedir(subdir);
+                continue;
+            }
+            
+            // Look for WAV files in subdirectory
+            while ((subentry = readdir(subdir)) != NULL) {
+                if (ends_with_wav(subentry->d_name)) {
+                    // Calculate needed space for new entry (full path)
+                    size_t needed_space = strlen(full_path) + 1 + strlen(subentry->d_name) + 2; // +2 for ';' and '\0'
+                    if (!first_entry) needed_space += 1; // for semicolon separator
+                    
+                    // Resize buffer if needed
+                    while (result_size + needed_space >= result_capacity) {
+                        result_capacity *= 2;
+                        char *new_result = realloc(result, result_capacity);
+                        if (!new_result) {
+                            free(result);
+                            free(example_name);
+                            closedir(subdir);
+                            closedir(dir);
+                            return NULL;
+                        }
+                        result = new_result;
+                    }
+                    
+                    // Add separator if not first entry
+                    if (!first_entry) {
+                        strcat(result, ";");
+                        result_size += 1;
+                    }
+                    
+                    // Add the full path
+                    strcat(result, full_path);
+                    strcat(result, "/");
+                    strcat(result, subentry->d_name);
+                    result_size += strlen(full_path) + 1 + strlen(subentry->d_name);
+                    
+                    first_entry = 0;
+                }
+            }
+            
+            free(example_name);
+            closedir(subdir);
+        }
+    }
+    
+    closedir(dir);
+    
+    // If no WAV files found, return empty string
+    if (result_size == 0) {
+        strcpy(result, "");
+    }
+    
+    return result;
+}
+
+
+// Main function to scan directory and return formatted string
+char* scan_for_wav_pretty(const char *directory_path) {
+  DIR *dir;
+  struct dirent *entry;
+  struct stat statbuf;
+  char full_path[1024];
+  char *result = NULL;
+  size_t result_size = 0;
+  size_t result_capacity = 1024;
+  int first_entry = 1;
+    
+  // Initialize result buffer
+  result = malloc(result_capacity);
+  if (!result) return NULL;
+  result[0] = '\0';
+    
+  // Open directory
+  dir = opendir(directory_path);
+  if (!dir) {
+    free(result);
+    return NULL;
+  }
+    
+  // Iterate through directory entries
+  while ((entry = readdir(dir)) != NULL) {
+    // Skip . and .. entries
+    if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
+      continue;
+    }
+        
+    // Create full path
+    snprintf(full_path, sizeof(full_path), "%s/%s", directory_path, entry->d_name);
+        
+    // Check if it's a directory
+    if (stat(full_path, &statbuf) == 0 && S_ISDIR(statbuf.st_mode)) {
+      // This is a subdirectory, scan for WAV files in it
+      DIR *subdir;
+      struct dirent *subentry;
+            
+      subdir = opendir(full_path);
+      if (!subdir) continue;
+            
+      // Extract example name from folder name
+      char *example_name = extract_example_name(entry->d_name);
+      if (!example_name) {
+        closedir(subdir);
+        continue;
+      }
+            
+      // Look for WAV files in subdirectory
+      while ((subentry = readdir(subdir)) != NULL) {
+        if (ends_with_wav(subentry->d_name)) {
+          // Calculate needed space for new entry
+          size_t needed_space = strlen(example_name) + 1 + strlen(subentry->d_name) + 2; // +2 for ';' and '\0'
+          if (!first_entry) needed_space += 1; // for semicolon separator
+                    
+          // Resize buffer if needed
+          while (result_size + needed_space >= result_capacity) {
+            result_capacity *= 2;
+            char *new_result = realloc(result, result_capacity);
+            if (!new_result) {
+              free(result);
+              free(example_name);
+              closedir(subdir);
+              closedir(dir);
+              return NULL;
+            }
+            result = new_result;
+          }
+                    
+          // Add separator if not first entry
+          if (!first_entry) {
+            strcat(result, ";");
+            result_size += 1;
+          }
+                    
+          // Add the formatted entry
+          strcat(result, example_name);
+          strcat(result, "/");
+          strcat(result, subentry->d_name);
+          result_size += strlen(example_name) + 1 + strlen(subentry->d_name);
+                    
+          first_entry = 0;
+        }
+      }
+            
+      free(example_name);
+      closedir(subdir);
+    }
+  }
+    
+  closedir(dir);
+    
+  // If no WAV files found, return empty string
+  if (result_size == 0) {
+    strcpy(result, "");
+  }
+    
+  return result;
+}
+
+/* // Example usage */
+/* int main() { */
+/*   const char *test_dir = "/path/to/your/directory"; */
+/*   char *result = scan_wav_directory(test_dir); */
+    
+/*   if (result) { */
+/*     printf("Found WAV files: %s\n", result); */
+/*     free(result); */
+/*   } else { */
+/*     printf("Error scanning directory or no WAV files found.\n"); */
+/*   } */
+    
+/*   return 0; */
+/* } */